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call_center_monitoring

MAC NODE.JS AND NECESSERY PACKAGES INSTALLATION

  1. get LTS version from https://nodejs.org/en/download/ and install it
  2. you can check where node.js was installed with which node or check it's version with node --version
  3. copy or create package.js to proper directory and run npm install there

MAC KAFKA INSTALLATION

  1. brew install kafka will install kafka (in my case it was in /usr/local/etc/kafka)
  2. go to kafka directory and start zookeeper server in background with proper log directory: zookeeper-server-start zookeeper.properties > ~/zookeeper.log &
  3. check if it works correctly: telnet localhost 2181 and then ruok (which stands for "are you ok?"). service should reply "imok" and close telnet session note: if you're on High Sierra or higher you may be missing telnet. simply: brew install telnet
  4. start up our Kafka message broker: kafka-server-start server.properties > ~/kafka_server.log & --- testing if kafka is working fine ---
  5. create test topic: kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test
  6. list topics: kafka-topics --list --zookeeper localhost:2181
  7. start console producer and write some msgs: kafka-console-producer --broker-list localhost:9092 --topic test
  8. in different terminal start consuming msgs: kafka-console-consumer --bootstrap-server localhost:9092 --topic test --from-beginning

MAC MySQL installation and set-up

  1. download image from https://dev.mysql.com/downloads/mysql/ (btw, you do not need to sign-up)
  2. follow wizard to install and get temp. password, in my case it was - host: root@localhost, pwd: TzqA)a9BRD7P
  3. start mysql (you can use MySQL preference pane)
  4. cd /usr/local/mysql/bin
  5. ./mysql -u root -p and pass password you got during installation
  6. create reset tmp pwd, create new user, pwd and db:
    • ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';
    • GRANT ALL PRIVILEGES ON *.* TO 'slaw'@'localhost' IDENTIFIED BY 'slaw123';
    • \q to exit and ./mysql -u slaw -p to enter client again
    • CREATE DATABASE call_center;
  7. run sql scripts with data: mysql -u slaw -p call_center < '<path-to-script>/create_init_records.sql'
  8. also its useful to get better tool to interact with your db, I'm using e.g. dbvizualizer

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